Geografic-Information-System/lib/gis/proj1.c

/*!
  \file lib/gis/proj1.c
 
  \brief GIS Library - Projection support (window related)
  
  (C) 2001-2011 by the GRASS Development Team
  
  This program is free software under the GNU General Public License
  (>=v2). Read the file COPYING that comes with GRASS for details.
  
  \author Original author CERL
*/

#include <grass/gis.h>

/*!
  \brief Query cartographic projection
  
  This routine returns a code indicating the projection for the active
  region. The current values are (see gis.h)

   - PROJECTION_XY      0 - x,y (Raw imagery)
   - PROJECTION_UTM     1 - UTM   Universal Transverse Mercator
   - PROJECTION_SP      2 - State Plane (in feet) - not used, removed
   - PROJECTION_LL      3 - Latitude-Longitude
   - PROJECTION_OTHER  99 - others

   Others may be added in the future.

   \return projection code (see above)
*/
int G_projection(void)
{
    struct Cell_head window;

    G_get_set_window(&window);
    return window.proj;
}